Window-screen.



. R. B. SWART.

WINDOW SCREEN. APPLICATION FILED 001'. 22, 1910.

Patented Sept. 5, 1911.

UNITED STATES PATENT OFFICE.

ROBERT B. SWART, OF DETROIT, MICHIGAN, ASSIGNOR TO'AMEBICAN LIETAL SCREEN AND WEATHERSTRIP COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

WINDOW-SCREEN.

Patented Sept. 5, 1911.

To all whom it may concern.

Be it known that I, Ronnn'r B. SwAR'r, a

troit, county of Wayne, State of Michigan,

have invented acertain newand useful Improvement in Window-Screens, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying'drawings, which form a part of this specification.

This invention relates to window screens. It has for its object an improved all metal screen, in which the screenwire is secured without the use of tacks, rivets or staples, and the frame bars are secured together in a firm manner by a few small screw bolts, (machine screws).

One principal object of the invention is to produce a structure-in which the screen wire is interlocked between folds of the frame bars and from which the screen wire may be removed and a new wire replaced with the same case and readiness with which the screen wire was originally put in place.

In the drawings :Figure 1, is an elevation of an assembled screen. Fig. 2, is a cross section of the front and rear frame bars in interlocking relation and taken at the line aa of Fig. 1. Fig. 3, is a perspective showing the meeting ends of two rear frame bars. Fig. 4, is a perspective showingthe meeting ends of two front frame bars. Figs. 3 and 4 show the parts located in proper relation for making the close joint, but spread somewhat from the position they finally occupy.

The frame bars which are mitered together at the corners will be considered as front frame bars of the assembled frame; those which lap at the assembled corners will be considered as the rear frame bars. These frame bars will be referred to for short as front bars and rear bars. The front side bars andthe end bars arealike, except that the one is provided with underlapping projections extending beyond the miter line and lying to the outside of the frame, and the other is provided with underlapping projections extending beyond the miter line and at the inside of the frame.

Considering the front bar 2 as a longitudia terminal which ismitered at 4 for about half the distance across the frame and provided with a projection 5 which is of about half the thickness of the web of the front bar 2, and its under-face is flush with the under face of the web. of the front bar 2. This projection extends beyond the miter line and is squared with respect to the side lines of the bar 2 and runs somewhat short of the point calculated as the end of the frame, so that the flange 16 of'the front cross bar 3 may overlap it' at the end. This projection 5 underlaps the projecting point 6 of the front cross bar 3, which projecting point 6 is mitered and the mitered edge engages against a bearing 7 that extends diagonally across the projections 5 from the mitered edge 4 to the outer edge. The end of the front cross bar 3 on its inner side is provided with a' projection 8 squared with reference to the side lines of the front cross bar 3 and engages under the mitered edge 4 of the front side bar 2, so that both pro jections 8 and 5 engage under. the conti ous part of the adjacent front bar, giving to the finished and assembled structure the appearance of a nearly straight miter extending across the frame.

The frontbar 2 is provided with a middle web that forms the face of the frame, and with a flange 16 along the outer run of the bar that is bentdown nearly at right angles to the web and with a flange 10 along the inner edge of the bar 2. This flange is turned until it is nearly parallel with the face of the bar 2, but spaced therefrom by a sufficient distance to allow the engagement of the edge of the rear bar between the two faces of this part. The rear bars 11 and 12 are provided with terminals that are squared across their entire ends and these overlap and are pierced with holes 13 and 14 through which the screw bolt 15 passes. The outer edge of the rear bars 11 and 12 is turned to a flange 9 at as nearly as possible a right angle to the main face, and in the assembled structure this flange engages inside of the flange 16 and in close relation thereto. The inner edge 17 is turned to parallel relation with the face of the rear bar 12 and is then returned, being bent outward giving to the flange 17, consisting of the inturned part 17 and the return part 17 the form of a double groove, which has in cross section the shape of the letter 8 (shown as a part ,17'? engages between the front of the .frame bar 2 and the inturned flan e 10.

The returned partof the flan e on the extreme ends of the rear cross fiat 11 is cut away for a distance back from each end equal to the width of the rear side bar 12. On the rear side bar 12 these extreme ends may be removed or left as may be-thought best, the removal of the inturned flange from one rear bar being sufficient to allow the parts to be assembled properly. The

front bars of the frame are brought together with the mitered edges in proper relation and are secured by eight small screws 19,

and the frame thus formed completes the entire rectangle of the front and half completes the frame, the rear bars being not yet inserted in place. The screen wire cut to a size to overlap the flanges 10 (the corners of the screen may be cut away so as to more readily fold into place at the corners of the screen) and fold into thegroove along the part 17 ofthe S shaped flange is lald in place and the side and end rear bars are then inserted by placing the flange 17 to engage under the flange 10 and forcing th-eparts into position with the flange 9 .engaging inside of the flange 16. After the four rear bars oft-he frame have been put in place the final screws 15 are put in place and secured. Preferably all of the screws are machine screws with nuts and no threads are cut in the thin metal of the frame.

Hinges 20 consisting of pieces of sheet metal bent to form the knuckle ring 21 and the securing flange 22 are inserted through one of the frame bars (as the frame bar 23) andriveted or otherwise secured in place.

What I claim is 1.'A front frame bar of a window screen having an angle flange forming a groove along one side and a flange formin a;

groovealong the opposite side, in comblnation with a rear frame bar having a doubly grooved or S shaped flange adapted to engage in a groove of the front frame member, and an angled flange adapted to engage the angled flange of the front frame bar, substantially as described.

2. In a window screen, in combination with front framebars provided with end terminals partially mitered and partially squared,'the squaredparts being arranged to engage under the mitered parts, rear frame bars, the front frame bars having edge flanges adapted to interlock with the corresponding edge flanges of the rear frame bars, substantially as described.

3.A window screen, having in combination front frame bars provided with rigid inturned inside edges, rear. frame bars or interlocking bars engaging-within said front bars having rigid inner. edges folded over said inturned edges of the front frame bars and a screen clasped between the inner edges of said front frame bars and rear frame bars, substantially as described.

4. A window screen, having in combination front frame bars provided with inturned inner edges and angled flanges on the outside edges, rear frame bars or interlocking bars engaging within said front frame bars and having inner edgesfolded over said inner edges of the front frame bars and angled flanges on the outside edges adapted to fitclose to the angled flanges of the frame bars and thereby cause the-inner engaging edges to fit tight and a wire screen engaging between the inner edges of said front frame bars and the rear frame bars, substantially as described.

5. A window screen, having in combination front frame bars having inturned edges and joined at their ends by miters on the upper portion of their thickness and squared joints on the lower portion of their thickness, a screen wire, interlocking rear connection with said inner edges of the front frame bars, the said rear frame bars having their inner edges cut away at the ends to allow the adjacent rear frame bars to slide thereunder and form a squared joint therewith, and screws passed through the adjacent frame bars on their mitered lines adapted to secure the said joints of the said rear' frame bars, substantially as described.

In testimony whereof, I sign this specification in the presence of two witnesses.

ROBERT B. SWART.

Witnesses:

CHARLES F. BURTON, VIRGINIA C. SPRATT. 

